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#--
#Copyright 2007 Nominet UK
#
#Licensed under the Apache License, Version 2.0 (the "License");
#you may not use this file except in compliance with the License.
#You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
#Unless required by applicable law or agreed to in writing, software
#distributed under the License is distributed on an "AS IS" BASIS,
#WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#See the License for the specific language governing permissions and
#limitations under the License.
#++
#= NAME
#
#digitar - Ruby script to perform DNS queries, validated against the IANA TAR
#(trust anchor repository).
#
#= SYNOPSIS
#
#digroot name [ type [ class ] ]
#
#= DESCRIPTION
#
#Performs a DNS query on the given name. The record type
#and class can also be specified; if left blank they default
#to A and IN. The program firstly performs the requested DNS
# query. The response is then validated from the signed root.
#
#= AUTHOR
#
#Michael Fuhr <mike@fuhr.org>
#Alex D <alexd@nominet.org.uk>
begin
require 'rubygems'
rescue LoadError
end
require 'dnsruby'
include Dnsruby
raise RuntimeError, "Usage: #{$0} name [ type [ class ] ]\n" unless (ARGV.length >= 1) && (ARGV.length <= 3)
resolver = Dnsruby::Resolver.new()
resolver.do_validation = true
res = Dnsruby::Recursor.new(resolver)
# Dnsruby::TheLog.level=Logger::DEBUG
name, type, klass = ARGV
type ||= "A"
klass ||= "IN"
begin
answer = nil
answer = res.query(name, type, klass)
print answer
rescue Exception => e
print "query failed: #{e}\n"
end
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